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Check List the Journal Of 12 4 1920 the journal of biodiversity data 8 July 2016 Check List LISTS OF SPECIES Check List 12(4): 1920, 8 July 2016 doi: http://dx.doi.org/10.15560/12.4.1920 ISSN 1809-127X © 2016 Check List and Authors Arachnids from Araripe Plateau, Ceará, Brazil Raul Azevedo1*, Eridiane da S. Moura1, Adreany S. Lopes2, Leonardo S. Carvalho3, 4, Sidclay C. Dias5 and Antonio D. Brescovit 6 1 Universidade Federal do Cariri, Laboratório de Entomologia. Rua Vereador Maciel Lopes, s/n, São José, CEP 63133-630, Crato, CE, Brazil 2 Quadra 15, Bloco 03, apto. 302, Morada Nova, CEP 264023-210, Teresina, PI, Brazil 3 Universidade Federal do Piauí, Campus Amílcar Ferreira Sobral – CAFS, BR 343, km 3.5, Bairro Meladão, CEP 64800-000, Floriano, PI, Brazil 4 Programa de Pós-Graduação em Zoologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil 5 Rua Arício Guimarães Fortes, Ed. Jardim da Atalaia, 826, apto. 401, CEP 49037-060, Atalaia, Aracaju, SE, Brazil 6 Laboratório Especial de Coleções Zoológicas, Instituto Butantan. Av. Vital Brasil, 1500 05503-900 São Paulo, SP, Brazil * Corresponding author. E-mail: [email protected] Abstract: The Araripe Plateau is situated in the states harvestmen (De Souza et al. 2014) species recorded for of Ceará, Piauí and Pernambuco, northeastern Brazil, the Caatinga biome. These numbers represent about in the Caatinga biome, semiarid domain. This region 8.5%, 21% and 5%, respectively, of the spiders, scor- of Brazil is characterized by high temperatures and pions and Laniatores harvestmen species recorded in low rainfall. Nevertheless, due to its high elevation Brazil (Carvalho et al. 2014; Porto et al. 2014; De Souza and large amount of orographic rainfall, the Araripe et al. 2014). The potential explanations for these num- Plateau is an exception as a seasonal semi-deciduous bers are different for each group. Considering that the forest with high humidity in the semiarid domain and Caatinga occupies about 10% of Brazilian territory, the the Caatinga biome. Herein a species list of Araripe number of spider species might represent a clear effect Plateau arachnids is presented from the compilation of sampling deficiency, as it is lower than expected by of data from in situ sampling from January to May chance (Carvalho et al. 2014). The scorpion species rich- 2013, from the literature, and from Brazilian arachnid ness in the Caatinga is higher than expected by chance. collections data. A total of 68 species were recorded for However, considering that the world’s highest scorpion the area, of which 53 were spiders, eight harvestmen species richness (4–13 sympatric species at one site) and seven scorpions. The species richness recorded here occurs in drier areas (Polis 1990), more scorpion species is considered significant regarding the known diversity would be expected to be found in the Caatinga. On the of Arachnida in the semiarid region and contributes to other hand, for harvestmen, the low species richness expanding our knowledge of the area. in the Caatinga biome was expected, as many species are ineffective at preventing water loss (Santos 2007a), Key words: Arachnida; Araneae; Scorpiones; thus resulting in higher species richness in humid areas Opiliones; Caatinga throughout Brazil, such as the Atlantic Forest (Pinto-da- Rocha et al. 2005). In the present paper, we present a list of the spiders, INTRODUCTION scorpions and harvestmen from the Araripe Plateau, The Caatinga biome is one of the least studied northeastern Brazil. The arachnid fauna of the area has Neotropical biomes (Leal et al. 2005; Santos et al. been the focus of only a few published papers, mainly 2011), with current data suggesting that about 41% consisting of the description of fossil (i.e., Campos of the area has never been surveyed by scientists and 1986; De Carvalho and Lourenço 2001; Selden et al. 80% has been poorly sampled (Tabarelli and Vicente 2006) or living taxa (i.e., Bonaldo and Brescovit 1998; 2004). This situation is even worse for taxa such as Corronca 1998; Rheims and Brescovit 2004; Lourenço invertebrates (Lewinson et al. 2005). Among arachnids, 2010, 2014; Ruiz 2013; Huber et al. 2014). None of recent estimates indicate that there are no records of these publications directly dealt with the Araripe spiders (Carvalho et al. 2014) or scorpions (Porto et al. Plateau arachnid fauna, but focused on taxonomic 2014) for about 70% of the Caatinga area. issues rather than providing species lists. The present Even considering such heterogeneous sampling, paper is the first to compile published records and new presently there are 271 spiders (Carvalho et al. 2014), records gathered from field work into a species list for 28 scorpions (Porto et al. 2014) and 28 Laniatores the area. Check List | www.biotaxa.org/cl 1 Volume 12 | Number 4 | Article 1920 Azevedo et al. | Arachnids from Floresta Nacional do Araripe Figure 1. Map of the sampled localities (black dots) and its location in the Araripe National Forest (in green) and the Araripe Plateau (in grey). Municipali- ties below the thick line are located in the State of Pernambuco, and those above are located in the State of Ceará. MATERIALS AND METHODS (with and without UV lamps) and litter sampling Study area (1 m2 of litter sifted and hand sorted in each sample). The Araripe Plateau is located in northeastern Brazil, All standardized samplings followed usual arachnid in the states of Ceará, Piauí and Pernambuco. It includes sampling methods, as described in Carvalho (2015). the Araripe National Forest (Floresta Nacional do Ara- The species were identified using keys for spiders (Levi ripe, 07°20ʹ42ʺ S, 039°25ʹ6ʺ W). The region is within 1968, 1991, 1997, 2004; Corronca 1998; Bonaldo 2000; the Caatinga biome, a warm (mean annual temperature Brescovit and Rheims 2000; Rheims and Brescovit 2004; 26°C − 28°C; Nimer 1972) semiarid biome. Despite the Santos 2007b; Abrahim et al. 2012), scorpions (Lourenço dry and warm environment, the high elevation of the 2002; De Souza et al 2009) and harvestmen (Pinto-da- region (more than 500 m above sea level), contributes to Rocha 1997) and by comparison with identified material the production of approximately 1,200 mm of orograph- deposited in institutional collections. ic rainfall (Andrade-Lima 1982; Prado 2003; Leal et al. Collected specimens were deposited in the following 2005). This allows the formation of forested enclaves collections: Museu Paraense Emílio Goeldi, Belém, Pará on the windward slopes of hills, known as “brejo-de- (MPEG; curator A.B. Bonaldo); Instituto Butantan, altitude” (Prado 2003; Leal et al. 2005). São Paulo, São Paulo (IBSP; curator A.D. Brescovit); Universidade Federal de Minas Gerais, Belo Horizonte, Data collection Since 2010, occasional arachnid surveys have been Minas Gerais (UFMG; curator A.J. Santos); Coleção carried out by various researchers in several localities, de História Natural da Universidade Federal do Piauí both inside and outside the Floresta Nacional do Araripe, (CHNUFPI; curator E.F.B. Lima); Universidade Federal such as the municipalities of Crato, Juazeiro do Norte da Paraíba, João Pessoa, Paraíba (UFPB; curator M.B. and Barbalha, state of Ceará, (Figure 1). The sampling da Silva) and Museu Nacional do Rio de Janeiro, Rio de points map (Figure 1) was constructed using ArcGis 10.3 Janeiro, Rio de Janeiro (MNRJ; curator A.B. Kury). software (ESRI 2015). The species list herein also includes information The arachnids were sampled using three techniques: gathered from previous publications on arachnids of pit-fall traps for invertebrates (500 ml plastic buckets the Araripe plateau: Bonaldo and Brescovit (1998), buried at ground level, with 70% ethanol as preservative, Corronca (1998), Lourenço (2010, 2014), Lourenço et placed at least 5 m apart and kept open for at least five al. (2013), Maury (1982), Rheims and Brescovit (2004), consecutive days), diurnal and nocturnal hand searches Ruiz (2013) and Huber et al. (2014). Check List | www.biotaxa.org/cl 2 Volume 12 | Number 4 | Article 1920 Azevedo et al. | Arachnids from Floresta Nacional do Araripe RESULTS The compiled list includes 68 arachnid species, C. L. Koch, 1841 (Corinnidae), Neodrassex Ott, 2012 represented by 53 spider, seven scorpions and eight (Gnaphosidae), Otiothops MacLeay, 1839 (Palpiman- harvestmen species (Table 1). Thirty-five species idae), Ariadna Audouin, 1826 (Se gestri idae) and Tenedos were identified to species level and six un described O. Pickard-Cambridge, 1897 (Zodariidae). The spider species were recognized, belonging to the genera family Corinnidae and scorpion family Buthidae pre- Orthonops Chamberlin, 1924 (Caponiidae), Corin na sented the highest species richness. Table 1. Spider, scorpion and harvestman species list from the Araripe Plateau, Ceará, Brazil, with the number of specimens collected and source of information gathered. Specimens from museums or Taxa Total Species collected in this study cited in the literature ARANEAE Araneidae Araneus venatrix (C. L. Koch, 1838) 1 MPEG 024478 Aculepeira cf. travassosi (Soares & Camargo, 1948) 1 CHNUFPI 1203 Araneus guttatus (Keyserling, 1865) 2 CHNUFPI 1205, 1225 Argiope argentata (Fabricius, 1775) 1 CHNUFPI 1210 Kapogea cyrtophoroides (F. O. Pickard-Cambridge, 1 CHNUFPI 1219 1904) Caponiidae Orthonops sp. n. 1 2 MPEG 24475, 024476 Corinnidae Corinna gr. aenea sp. n. 2 3 CHNUFPI 0102, 0127, 0136 Corinna gr. capito sp. 1 1 CHNUFPI 0119 Falconina gracilis (Keyserling, 1891) 2 MPEG 024479, 024480 Abapeba gr. abalosi (Mello-Leitão, 1942) 2 MPEG 024437, 024438 Attacobius verhaaghi Bonaldo & Brescovit, 1998 1 Bonaldo and Brescovit (1998) Corinna sp. 1 3 MPEG 024447, 024448, 024449, Mazax sp. 1 4 MPEG 024433, CHNUFPI 0113 Castianeira sp. 1 1 MPEG 024435 Castianeira sp. 2 1 MPEG 024432 Corinninae sp. 1 1 CHNUFPI 0092 Castianeirinae sp. 1 1 MPEG 024434 Ctenidae Ctenus sp. 1 1 CHNUFPI 1217, 1224 Cyrtaucheniidae Fufius sp. 1 1 CHNUFPI 1218 Dictynidae Dictyna sp. 1 1 CHNUFPI 1211 Deinopidae Deinopis sp.
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